Precise determination of minor alloyed elements in steel by glow discharge optical emission spectrometry with pulsed-voltage modulation technique

Research output: Contribution to journalArticlepeer-review

Abstract

A pulsed-voltage was applied to a glow discharge lamp for a modulation detection technique in d.c. glow discharge optical emission spectrometry. Emission signals from the glow discharge plasma were modulated by a cyclic variation in the discharge voltage so that only the desired signals would be detected without any noise with a lock-in amplifier. Molybdenum and vanadium determinations in a steel sample having contents of several 0.001 mass% was performed to estimate the analytical precision. The relative standard deviations of the intensities of the Mo I 379.65 nm and the V II 310.10 nm were 0.2-0.6% in the modulation method, whereas they were 2.6-3.6% in a conventional detection method. Compared with the result by the conventional detection method, the modulation method yielded a better precision in the analytical values. This technique contributes to the precise determination of minor elements alloyed in steels.

Original languageEnglish
Pages (from-to)35-39
Number of pages5
JournalBUNSEKI KAGAKU
Volume53
Issue number1
DOIs
Publication statusPublished - 2004 Jan

Keywords

  • Glow discharge optical emission spectrometry
  • Minor alloyed element
  • Molybdenum
  • Precision
  • Steel
  • Vanadium
  • Voltage modulation

ASJC Scopus subject areas

  • Analytical Chemistry

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